Motor, compressor and air conditioner

Abstract

The utility model provides a motor, a compressor and an air conditioner, the motor comprises a stator and a terminal, the stator comprises a stator core and a winding, an extension wire is led out from the winding, and the extension wire comprises a first extension wire and a second extension wire; a part of wire harness of the first extension wire is located above the stator core, the second extension wire is connected and conducted with the terminal to form a neutral point, the neutral point is fixed on the part of wire harness located above the stator core, and the stator is located above a compressor oil pool. According to the utility model, the problem of poor insulation caused by the fact that the neutral point is immersed by liquid due to the fact that the internal liquid level of the existing compressor is high and contacts with the neutral point of the motor can be solved, and the safety performance is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, concretely relates to a motor, compressor and air conditioner. BACKGROUND

[0002] The compressor motor adopting "Y" type wiring mostly adopts fixing the neutral point after covering the insulating layer on the winding surface or fixing on the motor insulating framework, but since the insulating layer covering the outer surface of the neutral point is heat shrink sleeve or PET film, this structure cannot completely seal the conductive neutral point terminal. The compressor has the situation of internal liquid level being too high or even completely submerging the motor in some application scenarios of air conditioning system, at this moment, the liquid (the mixture of compressor refrigeration oil and refrigerant) with strong conductivity will infiltrate the neutral point through the gap between the heat shrink sleeve and the wire or the gap between the insulating layer covering the surface of the neutral point, thereby causing poor insulation.

[0003] Another problem of the existing "neutral point heat shrink sleeve sealing" scheme is that an additional heating process is needed to complete the heat shrink sleeve heating and shrinking to complete the fixing of the sleeve and the sealing of the terminal (the neutral point), which is low in production efficiency and high in energy consumption.

[0004] Since the "Y" type wiring compressor motor in the prior art has the technical problems of poor insulation caused by the leakage of liquid from the neutral point in the state of internal liquid level submerging the motor, the utility model researches and designs a motor, a compressor and an air conditioner. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model solves the technical problems of overcoming the defects of poor insulation caused by the leakage of liquid from the neutral point in the state of internal liquid level submerging the motor of the "Y" type wiring compressor motor in the prior art, thereby providing a motor, a compressor and an air conditioner.

[0006] In order to solve the above problems, the utility model provides a motor, which comprises:

[0007] A stator and a terminal, the stator comprises a stator core and a winding, an extension line is led out from the winding, the extension line comprises a first extension line and a second extension line;

[0008] Part of the wire bundle of the first extension line is located above the stator core, the second extension line is connected with the terminal and is conductive, forming a neutral point, the neutral point is fixed to the part of the wire bundle located above the stator core, and the stator is located above the compressor oil pool.

[0009] In some embodiments,

[0010] The first insulation sleeve is arranged above the stator core, and the part of the first extension wire above the stator core is sleeved in the first insulation sleeve, and the neutral point is also sleeved in the first insulation sleeve.

[0011] In some embodiments,

[0012] The second insulation sleeve is arranged inside the first insulation sleeve, and the second insulation sleeve is sleeved with the neutral point and the part of the second extension wire connected with the neutral point.

[0013] In some embodiments,

[0014] The first insulation sleeve is a single-layer or multi-layer structure, and the material of the first insulation sleeve is at least one of PET, PTFE, PI and PNT.

[0015] The material of the second insulation sleeve is a polyester layer, and the second extension wire is fixed and conductive with the terminal by riveting or welding.

[0016] In some embodiments,

[0017] The second insulation sleeve includes a closed end and an open end, the neutral point is inserted into the second insulation sleeve from the open end of the second insulation sleeve, and the position of the terminal connected with the second extension wire is away from the closed end.

[0018] In some embodiments,

[0019] The second insulation sleeve is entirely arranged inside the first insulation sleeve.

[0020] The part of the first extension wire in the first insulation sleeve, the neutral point, the second insulation sleeve, the part of the second extension wire in the first insulation sleeve and the first insulation sleeve together form a neutral point assembly.

[0021] The upper end of the neutral point assembly has a distance l2 from the terminal or socket of the compressor, and the distance l2 is in the range of 15mm≤l2≤30mm.

[0022] The lower end of the neutral point assembly has a distance l1 from the winding, and the distance l1 is in the range of 5mm≤l1.

[0023] In some embodiments,

[0024] Further comprising a first insulation skeleton and a second insulation skeleton, the first insulation skeleton is located at the axial lower end of the stator, the second insulation skeleton is located at the axial upper end of the stator, the first extension wire is led out from the first insulation skeleton, the second extension wire is led out from the second insulation skeleton, a second extension wire outlet slot is arranged on the second insulation skeleton, and a second extension wire inlet slot is further arranged on the first insulation skeleton, so that the second extension wire is led out through the second extension wire outlet slot and guided to the second extension wire inlet slot, and further enters the first insulation sleeve and is connected and conducted with the terminal.

[0025] In some embodiments,

[0026] The axial depth of the second extension wire outlet slot is greater than 2 times the diameter of the second extension wire, the minimum circumferential width of the second extension wire outlet slot is greater than 1.5 times the diameter of the second extension wire, the second extension wire outlet slot has a plurality of axial heights, the difference between the plurality of axial heights is not more than 3-4mm, and the minimum circumferential width of the second extension wire inlet slot is greater than the sum of the diameters of the plurality of second extension wires.

[0027] In some embodiments,

[0028] Further comprising a lead-out wire assembly, a lead-out wire fixing structure and a rotor, and the first extension wire is connected with the lead-out wire assembly to form a lead-out wire for conducting the winding after being gathered by each phase, and the second extension wire is riveted with the terminal to form the neutral point for conducting the two; the lead-out wire fixing structure is arranged on the second insulation skeleton to fix the second extension wire led out through the second extension wire outlet slot, and the rotor is matched with the stator to be driven to rotate by the stator.

[0029] The utility model further provides a kind of compressor, it includes the motor of preceding.

[0030] The utility model further provides a kind of air conditioner, it includes the compressor of preceding.

[0031] The motor, compressor and air conditioner provided by the utility model have the following beneficial effects:

[0032] The utility model discloses a part wire harness of first extension line is arranged above the stator core, and the neutral point formed by the communication of second extension line and terminal is fixed on the part wire harness of first extension line above the stator core, and the stator is below the compressor oil pool, and the above-mentioned setting can set the neutral point below the stator in the prior art to the upper of the stator, can effectively prevent the neutral point from being infiltrated by the lower liquid of compressor shell and cause the situation of electric leakage, effectively solve the problem of poor insulation caused by the contact of the neutral point of motor and the high liquid level in the existing compressor, and effectively improve the safety performance. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is the plan view structure diagram of motor stator in the prior art;

[0034] Figure 2 is the internal front view structure diagram of compressor in the prior art;

[0035] Figure 3 is the plan view structure diagram of motor stator of the utility model;

[0036] Figure 4 is the enlarged structure diagram of neutral point assembly of the utility model;

[0037] Figure 5 is the internal front view structure diagram of compressor of the utility model;

[0038] Figure 6 is the three-dimensional structure diagram of second insulation framework and second extension line wiring of the utility model;

[0039] Figure 7 is the plan view structure diagram of second insulation framework and second extension line outlet slot of the utility model.

[0040] The reference signs are shown as follows:

[0041] 1, rotor;2, stator;3, stator core;4, winding;5, extension line;6, first extension line;7, second extension line;8, first insulation framework;9, second insulation framework;10, neutral point;11, lead-out wire assembly;12, shell;13, lead-out wire fixing structure;15, first insulation sleeve;16, second insulation sleeve;17, neutral point assembly;18, lead-out wire terminal or socket;19, second extension line outlet slot;20, second extension line inlet slot. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. The description of the at least one exemplary embodiment is merely illustrative in nature and in no way should be construed as limiting the present utility model and its applications or uses. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present utility model.

[0043] It is to be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that the terms "comprise" and / or "include" as used in the specification indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0044] Unless specifically stated otherwise, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in the various embodiments described herein are not limiting. Also, it should be understood that the dimensions of the various parts shown in the drawings are not necessarily to scale. Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the description of the present application. In all examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation. Thus, other examples of the exemplary embodiments can have different values. It should be noted that like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0045] In the description of the present utility model, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the scope of protection of the present utility model; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0046] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "upper", "lower", and the like, can be used to describe the relative position of one element or feature to another as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device in the figures is inverted, then a dependent "above" or "up" can be oriented "below" or "down" in the inverted configuration. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial relative descriptors used herein interpreted accordingly.

[0047] In addition, it should be noted that the use of "first", "second", and the like words of resemblance to define parts, is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the protection scope of the utility model.

[0048] As Figures 1-2The prior art scheme, the compressor motor includes stator, rotor. The stator has the following structure, the sheet body made of silicon steel sheet is stacked and fixed into stator core, the insulating skeleton is arranged at the both ends of the stator in the axial direction, the slot insulation is lined with the slot wall surface of the stator core, the winding is passed through the slot of the stator core and bypassed the insulating skeleton at both ends, and the lead-out wire and neutral point are extended from the winding body. The core includes yoke, tooth and slot, the yoke has the first surface in contact with the inner wall of the compressor shell, the second surface corresponding to the inner circle side of the yoke, the first surface has the recess for increasing the fluid flow path of the shell and the stator and the stress relief groove for reducing the stress concentration of the contact between the core and the shell; the stator core further includes the tooth extending from the yoke to the inner circle direction, the side of the tooth closest to the rotor is arc-shaped or nearly arc-shaped, to ensure that the uniform radial air gap is formed between the stator and the rotor; the side of the tooth closest to the rotor further includes the first pole shoe and the second pole shoe mirror-imaged opposite to the first pole shoe, the two pole shoes are completely symmetrical or different; the shape of the pole shoe is extended from the tooth body along the tangential direction, and the shape gradually decreases away from the width of the tooth body when viewed from the direction of the motor rotation axis, to ensure that the core part away from the center of the tooth has smaller magnetic conductivity; the above-mentioned tooth is uniformly distributed along the circumferential direction of the motor rotation axis, the tooth body is connected with the yoke, and the second surface of the yoke between adjacent teeth forms the slot of the stator; the above-mentioned slot insulation is composed of single-layer polyester film or other materials meeting the requirements of the compressor in electrical, fluorine resistance, temperature resistance and mechanical properties, and is attached to all side walls of adjacent teeth and the second surface of the yoke between adjacent teeth, to minimize the occupation of the stator slot area; the above-mentioned insulating skeleton is made of materials meeting the requirements of the compressor in electrical, fluorine resistance, temperature resistance and mechanical properties, and has the profile similar to the stator core and the tooth in the axial direction, and the first wall protruding in the axial direction on the basis of the above-mentioned profile and the second wall close to the inner circle side of the stator core, the first wall has radial slots for guiding the extension lines between the windings, and the buckles or radial bosses on the outer side of the first wall for assisting the layered wiring of the extension lines of the windings; the axial projection of the second wall has a structure similar to the inner side of the tooth, and the axial height is at least 1-2 mm higher than the distance of the pole shoe away from the tooth body, to ensure that the axial stroke of the winding during the production of the stator is the shortest, and the direction of the inner side of the stator slot close to the minimum end of the pole shoe has the buckle or boss protruding into the stator slot for limiting the movement of the slot insulation; the above-mentioned insulating skeleton has one set at each of the axial end surfaces of the stator core; the winding includes the element edge arranged in the slot on both sides of the tooth, the end part connected with the two element edges, and the first extension line and the second extension line, the above-mentioned element edge and end part are composed of multiple conductors with electrical conductivity greater than 3.5×10^7 S / m, and the surface of the conductors has a continuous insulation layer; the first extension line is grouped according to the phase of the winding, and the terminal and its accessories are connected to form the lead-out wire assembly, and the second extension line is connected to the terminal for conduction, melting conduction or welding conduction to form the neutral point.

[0049] In the prior art, the neutral point outer sleeve insulating sleeve or the heat shrinkable sleeve is inserted into the gap between the adjacent windings in the stator slot or is fixed at the end of the stator, and the compressor is in a low position in the system during the operation of the air conditioning system, and when the ambient temperature is low, the air conditioning system has a large amount of liquid refrigerant accumulation or a large suction supercooling degree, and the like, a large amount of liquid is accumulated in the compressor, and the liquid level is higher than the motor, at this time, the surface of the neutral point or the welding point is conductive, which becomes a key contribution point of increasing the leakage current, and the sleeve outside the neutral point is replaced by the heat shrinkable sleeve which can be closely attached to the body of the neutral point, which can theoretically reduce the liquid entering the inside of the sleeve, but cannot prevent the liquid from contacting the neutral point and communicating with other liquids in the compressor to form a leakage current path.

[0050] As shown in Figures 3-7 The utility model provides a motor, it includes:

[0051] Including stator 2 and terminal, stator 2 includes stator core 3 and winding 4, and the extension line 5 is led out from winding 4, and the extension line 5 includes first extension line 6 and second extension line 7;

[0052] The partial wire bundle of first extension line 6 is located above stator core 3, second extension line 7 is connected with terminal and is conducted, forms neutral point 10, neutral point 10 is fixed to the partial wire bundle located above stator core 3, and stator 2 is located above the compressor oil pool.

[0053] The utility model discloses a partial wire bundle of first extension line is arranged above stator core, and the neutral point formed by the communication of second extension line and terminal is fixed to the partial wire bundle of first extension line above stator core, since the stator is located below the compressor oil pool, by above-mentioned setting, can effectively set the neutral point in prior art below the stator to the upper of the stator, can effectively prevent the neutral point from being immersed by the liquid in the lower part of the compressor shell and cause the leakage, effectively solve the problem of insulation caused by the liquid immersion of the neutral point caused by the high internal liquid level of the existing compressor, effectively improve the safety performance.

[0054] The utility model discloses a partial wire bundle of first extension line is arranged above stator core, and the neutral point formed by the communication of second extension line and terminal is fixed to the partial wire bundle of first extension line above stator core, since the stator is located below the compressor oil pool, by above-mentioned setting, can effectively set the neutral point in prior art below the stator to the upper of the stator, can effectively prevent the neutral point from being immersed by the liquid in the lower part of the compressor shell and cause the leakage, effectively solve the problem of insulation caused by the liquid immersion of the neutral point caused by the high internal liquid level of the existing compressor, effectively improve the safety performance.

[0055] The utility model can effectively solve the following problems:

[0056] 1. Solve the poor insulation problem caused by neutral point leakage of Y-type wiring compressor motor in the internal liquid level submerged motor state;

[0057] 2. Solve the problem of low production efficiency and large energy consumption under the existing neutral point heat shrink sleeve sealing technology.

[0058] In some embodiments,

[0059] Further comprising a first insulation sleeve 15, the first insulation sleeve 15 is located above the stator core 3, and the part of the wire harness of the first extension line 6 above the stator core is sleeved inside the first insulation sleeve 15, and the neutral point 10 is also sleeved inside the first insulation sleeve 15.

[0060] This is the preferred structure form of the utility model, through the first insulation sleeve can be sleeved and fixed in the first extension line part of the wire harness in the first insulation sleeve, and also can be sleeved and fixed in the first insulation sleeve, form the neutral point fixed at the same time also effectively fixed to the stator above, preferably avoid the liquid level height of the stator below when rising, the case of infiltration to the neutral point occurs, improve the insulation performance of the neutral point.

[0061] In some embodiments,

[0062] Further comprising a second insulation sleeve 16, the second insulation sleeve 16 is sleeved with the neutral point 10, and the second insulation sleeve 16 is also sleeved with the part of the wire harness of the second extension line 7 connected with the neutral point 10, and the second insulation sleeve 16 is located inside the first insulation sleeve 15.

[0063] The utility model further through setting up the structure of second insulation sleeve, can be sleeved in the part of the wire harness of the second extension line connected with the neutral point and the neutral point, and further set up the second insulation sleeve in the inside of the first insulation sleeve, so as to realize the neutral point and the first extension line fixed at the same time also effectively guarantee the insulation performance between the neutral point and the first extension line, and guarantee the insulation performance between the first extension line and the second extension line.

[0064] In some embodiments,

[0065] The first insulation sleeve 15 is a single-layer or multi-layer structure, and the material of the first insulation sleeve 15 is at least one of PET, PTFE, PI and PNT;

[0066] The material of the second insulation sleeve 16 is a polyester layer, and the second extension line 7 is fixed and conductive with the terminal by riveting or welding.

[0067] The preferred structure and preferred material of the first insulating sleeve of the utility model, by adopting at least one of PET (thermoplastic polyester), PTFE (polytetrafluoroethylene), PI (organic high polymer material) and PNT (thermoplastic polyolefin), can effectively play the effect of insulation, ensure the fixation of the first extension line and the second extension line and the neutral point, and also play the effective insulation effect; the second insulating sleeve is preferably made of a polyester layer material, which can play the insulation effect between the neutral point and the second extension line and the first extension line, and improve the insulation effect.

[0068] In theory, the neutral point can be directly fixed together with the lead wire harness through the sleeve or buckle of the external device, but the terminal surface has an acute angle, and the vibration during the operation of the compressor can cause the insulation of the lead wire harness to be scratched, resulting in short circuit, and the additional neutral point insulating sleeve can avoid this problem.

[0069] In addition to the exposed conductor part formed by riveting or welding of the terminal of the neutral point, a single-layer or multi-layer second insulating sleeve made of insulating material is sleeved, and the insulating materials of the first and second insulating sleeves can be PET, PTFE, PI, PNT, etc., which can simultaneously meet the requirements of electrical performance, mechanical performance, temperature resistance and fluorine resistance, etc.

[0070] In some embodiments,

[0071] The second insulating sleeve 16 includes a closed end and an open end, the neutral point 10 is inserted into the interior of the second insulating sleeve 16 from the open end of the second insulating sleeve 16, and is spaced apart from the closed end by a preset distance greater than 0, and the position of the terminal connected with the second extension line 7 is the position away from the closed end.

[0072] The utility model prefers that one end of the second insulating sleeve of the neutral point external device is closed, and the closed end faces upward, which can effectively avoid the effect of liquid accumulation formed downward.

[0073] In some embodiments,

[0074] The second insulating sleeve 16 is entirely located in the interior of the first insulating sleeve 15;

[0075] The partial wire harness of the first extension line 6 in the first insulating sleeve 15, the neutral point 10, the second insulating sleeve 16, the partial wire harness of the second extension line 7 in the first insulating sleeve 15 and the first insulating sleeve 15 together constitute a neutral point assembly 17;

[0076] The upper end of the neutral point assembly 17 has a distance l2 from the lead terminal or socket 18 of the compressor, and the distance l2 ranges from 15mm to 30mm;

[0077] The lower end of the neutral point assembly 17 has a distance l1 from the winding 4, and the distance l1 ranges from l1≥5mm.

[0078] This is a further preferred structure of the utility model, because the lead-out wire is additionally fixed on the wire harness, the hardness is increased and it is difficult to bend, the distance designed by l2 ensures that the lead-out wire harness has a part which can be easily bent, and the operability of the staff when inserting the terminal of the lead-out wire into the terminal post of the compressor cover is ensured, the distance of l1 can limit the lead-out wire harness root to have a certain bending space when the staff inserts the terminal post, and the lead-out wire fixing structure on the insulation skeleton is prevented from being broken.

[0079] In the technical scheme of the utility model, the core, skeleton, slot insulation and winding of the motor are the same as the existing scheme, and need not be changed; the second extension line is appropriately lengthened, and is gathered and conducted into a neutral point according to the existing scheme, the neutral point is fixed at the positioning point of the lead-out wire harness, and extends along the direction of the lead-out wire harness to the direction of the lead-out wire terminal, meanwhile, an insulation sleeve is sleeved with the neutral point or the welding part and the outer sleeve of the lead-out wire harness, and the neutral point is fixed to be close to the harness; the height needs to meet that the lower end surface of the neutral point sleeve is l1 away from the height of the stator winding, the upper end surface of the neutral point sleeve is l2 away from the lead-out wire terminal or the socket, l1≥5mm so as to facilitate manual operation to fix the root of the harness, l2≥15mm so as to facilitate the operation and assembly process of the lead-out wire terminal insertion process and the terminal post of the compressor cover, and l2≤30mm so as to prevent the extension line of the lead-out wire from being too loose near the insertion position of the terminal post of the compressor cover and being close to the cover, and thus being scalded by the high temperature when being ring-welded by the cover; regarding the first extension line, since it is the access end of the three-phase winding, there is a large potential difference, in order to reduce the inter-phase leakage and the hidden danger of wire injury, an insulation sleeve needs to be additionally provided outside the conductor body with a basic insulation layer; regarding the second extension line, since it constitutes the neutral point of the Y-shaped wiring, there is no potential difference in the three-phase winding in theory, unless the extension line needs to be connected to the winding body of other phases along the periphery of the stator, otherwise, the sleeve need not be additionally provided; regarding the terminal or the welding point of the neutral point, since it is exposed, there are sharp corners in the riveting of the terminal or burrs and sharp protrusions in the welding process of the neutral point conductor, in order to prevent the structure from piercing the sleeve outside the lead-out wire harness and thus causing short circuit of the first extension line conductor, a polyester layer sleeve or a similar structure sleeve needs to be additionally provided outside the terminal or the welding point. The material of the sleeve needs to meet the requirements of electrical, fluorine resistance, temperature resistance and mechanical properties of the compressor, and the preferred material is PET, PTFE, PI or PNT, etc.

[0080] In some embodiments,

[0081] Further comprising a first insulation skeleton 8 located at the axial lower end of the stator 2 and a second insulation skeleton 9 located at the axial upper end of the stator 2, the first extension wire 6 is led out from the first insulation skeleton 8, the second extension wire 7 is led out from the second insulation skeleton 9, a second extension wire outlet slot 19 is arranged on the second insulation skeleton 9, and a second extension wire inlet slot 20 is further arranged on the first insulation skeleton 8, so that the second extension wire 7 is led out through the second extension wire outlet slot 19 and guided to the second extension wire inlet slot 20, and further enters the first insulation sleeve 15 and is connected and conducted with the terminal.

[0082] This is a further preferred structure of the utility model, through the first insulation skeleton is located at the upper end of the stator, the second insulation skeleton is located at the lower end of the stator, the first extension wire is led out from the first insulation skeleton, and the second extension wire is led out from the second insulation skeleton, and the second extension wire is led out from the second insulation skeleton and is guided to the second extension wire inlet slot on the first skeleton, and further enters the first insulation sleeve and is connected to form the neutral point, the lower winding lead can be effectively led out to the upper side, and the neutral point is located in the first insulation sleeve above the stator, the liquid in the compressor shell can not soak the neutral point, and the insulation performance is poor, the safety and reliability of motor operation are improved.

[0083] In some embodiments,

[0084] The axial depth of the second extension wire outlet slot 19 is greater than 2 times the diameter of the second extension wire 7, the minimum circumferential width of the second extension wire outlet slot 19 is greater than 1.5 times the diameter of the second extension wire 7, the second extension wire outlet slot 19 has a plurality of axial heights, the difference between the plurality of axial heights of the second extension wire outlet slot 19 is not more than 3-4mm, and the minimum circumferential width of the second extension wire inlet slot 20 is greater than the sum of the diameters of the plurality of second extension wires 7.

[0085] The limitation of the axial depth and width size of the second extension wire outlet slot can ensure that the extension wire has small resistance when entering the slot and is not easy to fall out after entering the slot due to vibration during operation; by limiting the axial height difference of the plurality of second extension wire outlet slots to 3-4mm, it can be ensured that the second extension wires do not overlap each other during extension along the outer wall of the skeleton, so as to avoid the possible damage of the enameled wire film when the extension wire is too long.

[0086] The utility model discloses a second extension line is from the position of prior art scheme offset, for guaranteeing the extension line of constituting neutral point does not lap other winding body in the process of converging wiring, needs setting up corresponding radial outgoing line slot and circumferential layered boss outside the insulation framework. Specifically, the outgoing line position of the second extension line of the first phase is shown, that is, the angle alpha range of the symmetric center line of the framework tooth body to the symmetric center line of the stator slot where the extension line is located, the outgoing line slot of the first phase extension line is opened, the corresponding axial depth is greater than 2 times the extension line diameter, and the minimum width is greater than 1.5 times the diameter, the outgoing line slot depth corresponding to the second extension line of the first phase is 3-4mm different from the axial depth, the outgoing line position of the second extension line of the third phase is shown, that is, the angle alpha range of the extension line elongation line from the position close to the extension line root of the framework tooth body to the slot where the extension line is located, the outgoing line slot of the third phase extension line is opened, the corresponding axial depth is greater than 2 times the extension line diameter, and the minimum width is greater than 1.5 times the diameter, and the outgoing line slot depth corresponding to the second extension line of the first phase and the second phase is 3-4mm different from the axial depth. The first extension line corresponding tooth of the first phase has a neutral point extension line into slot, and the slot depth is greater than 3-4 times the diameter, the into slot position is between the tooth corresponding to the first phase first extension line and the tooth corresponding to the third phase second extension line, and is located at the position corresponding to the two tooth slot center lines. The above slot is located on the first wall of the framework.

[0087] In some embodiments,

[0088] Further comprising the lead-out wire assembly 11, the lead-out wire fixing structure 13 and the rotor 1, and the first extension line 6 is connected with the lead-out wire assembly 11 to form the lead-out wire for conducting the winding 4 after being gathered by each phase, and the second extension line 7 is connected with the terminal to form the neutral point 10 for conducting the winding 4; the lead-out wire fixing structure 13 is arranged on the second insulation framework 9 to fix the second extension line 7 led out through the second extension line outgoing slot 19, and the rotor 1 is matched with the stator 2 to be driven to rotate by the stator 2.

[0089] The utility model further connects the first extension line through the lead-out wire assembly, fixes and guides the second extension line through the lead-out wire fixing structure, improves the orderly fixation of the wire harness, and improves the safety and reliability of motor operation.

[0090] Through the simple and ingenious design, the neutral point of the compressor motor can be effectively lifted, and leakage current exceeding the standard caused by the exposed conductor of the neutral point being conducted by liquid when the compressor is in a high liquid level or even the motor body is immersed in liquid can be avoided; meanwhile, the neutral point polyester layer sleeve fixed on the lead wire harness can also prevent the problem of the refrigerant being stored in the sleeve and conducting the terminal, and the compressor is more reliable.

[0091] In addition, the neutral point of the utility model uses the ordinary polyester layer sleeve, and does not need to use the heat shrinkable sleeve, thereby saving the production process of heating and shrinking the sleeve, improving the production efficiency and reducing the energy consumption in the production process.

[0092] In the alternative implementation scheme one, the neutral point is extended to the lead wire assembly wire harness and is fixed by a binding rope or a strap, the binding rope is wound for multiple turns to ensure that more than 2 / 3 of the total length of the neutral point sleeve is fixed by the binding, or the neutral point sleeve is bound at two or more positions to ensure that the neutral point does not deviate from the lead wire wire harness during the operation of connecting the lead wire to the cover terminal post of the compressor; the disadvantage of the binding fixing scheme is low efficiency, and in order to ensure that the binding rope does not come off, the binding rope needs to be tightly bound, and the tight binding of multiple wire harnesses can greatly increase the hardness of the lead wire wire harness, and the hardness can increase the operation difficulty of inserting the lead wire into the cover terminal post during the assembly of the compressor.

[0093] In the alternative implementation scheme two, the neutral point is extended to the lead wire assembly wire harness and is fixed by a pipe clamp or a wire clamp, and the scheme can improve the efficiency of the neutral point fixing operation, and the disadvantage is that the pipe clamp or the wire clamp used in the compressor needs to meet high material requirements and needs to meet the requirements of electrical properties, fluorine resistance, temperature resistance and mechanical properties, and the cost of the part is high.

[0094] In the alternative implementation scheme three, the neutral point is independently extended upward instead of being closely extended upward along the lead wire, and the neutral point is fixed by a bracket structure, and the disadvantage of the scheme is that the independently upwardly extended neutral point needs additional fixing structure cost, and the stator assembly needs to increase a rigid protruding neutral point structure, and the storage and transportation process is difficult to stack and is easy to be damaged.

[0095] The utility model also provides a kind of compressor, it includes the motor of preceding.

[0096] The technical scheme of the utility model can also improve the fluid circulation of the compressor and increase the winding heat dissipation efficiency.The neutral point processing scheme in mass production is inserted into the winding gap in the stator slot or is fixed to the stator winding end face, and the neutral point itself and its fixing structure can occupy the flow area of the winding gap, which can reduce the flow area of the stator and cause asymmetry.The technical scheme of the utility model does not need to occupy the flow area of the winding gap, which is beneficial to fluid circulation and winding heat dissipation.

[0097] The utility model still provides a kind of air conditioner, it includes the compressor of preceding.

[0098] The above only is the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement and improvement etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model. The above only is the preferred embodiment of the utility model, it should be pointed out that, for ordinary skilled person in the art, without departing from the technical principle of the utility model, can make a number of improvements and variations, these improvements and variations should be regarded as the protection scope of the utility model.

Claims

1. An electric machine characterized by: Comprising: a stator (2) comprising a stator core (3) and a winding (4), an extension wire (5) being led out from the winding (4), the extension wire (5) comprising a first extension wire (6) and a second extension wire (7); a part of the first extension wire (6) is located above the stator core (3), the second extension wire (7) is connected with the terminal and is in conduction, forming a neutral point (10), the neutral point (10) is fixed to the part of the first extension wire (6) located above the stator core (3), and the stator (2) is located above a compressor oil pool.

2. The motor of claim 1, further comprising: a first insulating sleeve (15) located above the stator core (3), and the part of the first extension wire (6) located above the stator core is sleeved inside the first insulating sleeve (15), and the neutral point (10) is also sleeved inside the first insulating sleeve (15).

3. The motor of claim 2, further comprising: a second insulating sleeve (16) sleeving the neutral point (10) and a part of the second extension wire (7) connected with the neutral point (10) inside, and the second insulating sleeve (16) is located inside the first insulating sleeve (15).

4. The motor of claim 3, wherein: the first insulating sleeve (15) is a single-layer or multi-layer structure, and the material of the first insulating sleeve (15) is at least one of PET, PTFE, PI and PNT; the material of the second insulating sleeve (16) is a polyester layer, and the second extension wire (7) is fixed and in conduction with the terminal by riveting or welding.

5. The motor of claim 3, wherein: the second insulating sleeve (16) comprises a closed end and an open end, the neutral point (10) is inserted into the second insulating sleeve (16) from the open end of the second insulating sleeve (16) and is spaced apart from the closed end by a preset distance greater than 0, and the position of the terminal connected with the second extension wire (7) is a position away from the closed end.

6. The motor of claim 3, wherein: the second insulating sleeve (16) is entirely located inside the first insulating sleeve (15); the part of the first extension wire (6) inside the first insulating sleeve (15), the neutral point (10), the second insulating sleeve (16), the part of the second extension wire (7) inside the first insulating sleeve (15) and the first insulating sleeve (15) together form a neutral point assembly (17); the upper end of the neutral point assembly (17) has a distance l2 to a lead terminal or a socket (18) of a compressor, and the distance l2 is in the range of 15mm≤l2≤30mm. The lower end of the neutral point assembly (17) has a distance l1 from the winding (4), and the distance l1 ranges from l1≥5mm.

7. The motor of claim 2, wherein: Further comprising a first insulation skeleton (8) and a second insulation skeleton (9), the first insulation skeleton (8) is located at the axial lower end of the stator (2), the second insulation skeleton (9) is located at the axial upper end of the stator (2), the first extension wire (6) is led out from the first insulation skeleton (8), the second extension wire (7) is led out from the second insulation skeleton (9), a second extension wire outlet slot (19) is arranged on the second insulation skeleton (9), a second extension wire inlet slot (20) is further arranged on the first insulation skeleton (8) to lead the second extension wire (7) out through the second extension wire outlet slot (19) and lead to the second extension wire inlet slot (20), and further into the first insulation sleeve (15) and connect and conduct with the terminal.

8. The motor of claim 7, wherein: The axial depth of the second extension wire outlet slot (19) is greater than 2 times the diameter of the second extension wire (7), the minimum circumferential width of the second extension wire outlet slot (19) is greater than 1.5 times the diameter of the second extension wire (7), the second extension wire outlet slot (19) has a plurality of axial heights that differ by no more than 3-4mm, and the minimum circumferential width of the second extension wire inlet slot (20) is greater than the sum of the diameters of the plurality of second extension wires (7).

9. The motor of claim 7, wherein: Further comprising a lead-out wire assembly (11), a lead-out wire fixing structure (13), and a rotor (1), the first extension wire (6) is connected with the lead-out wire assembly (11) to form a lead-out wire that conducts the winding (4) after being aggregated by each phase on the first insulation skeleton (8), and the second extension wire (7) is riveted with the terminal to form the neutral point (10) that conducts both, the lead-out wire fixing structure (13) is arranged on the second insulation skeleton (9) to fix the second extension wire (7) led out through the second extension wire outlet slot (19), and the rotor (1) cooperates with the stator (2) to be driven to rotate by the stator (2).

10. A compressor characterized by: The motor of any one of claims 1-9.

11. An air conditioner characterized by comprising: The compressor of claim 10.

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